New police operation against drink-drivers

In April, 12,000 drivers were tested over two days - 130 were caught with blood-alcohol levels above the legal limit.

Police say the message to motorists is failing to get through.

They say that 20 of the 93 road deaths in South Australia this year have been alcohol-related.

The officer in charge of traffic support, Superintendent Graham Lough, says 16- to 24-year-olds were often among those caught drink-driving and those who died.

"That is an alarming figure, and although we are not targeting that group in particular, unfortunately they are out there driving and on many occasions driving with a higher blood-alcohol content than they should," he said.